1 #ifndef foointrospecthfoo
2 #define foointrospecthfoo
5 This file is part of PulseAudio.
7 Copyright 2004-2006 Lennart Poettering
8 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
10 PulseAudio is free software; you can redistribute it and/or modify
11 it under the terms of the GNU Lesser General Public License as published
12 by the Free Software Foundation; either version 2.1 of the License,
13 or (at your option) any later version.
15 PulseAudio is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with PulseAudio; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
28 #include <pulse/operation.h>
29 #include <pulse/context.h>
30 #include <pulse/cdecl.h>
31 #include <pulse/gccmacro.h>
32 #include <pulse/channelmap.h>
33 #include <pulse/volume.h>
34 #include <pulse/proplist.h>
35 #include <pulse/format.h>
36 #include <pulse/version.h>
38 /** \page introspect Server Query and Control
40 * \section overv_sec Overview
42 * Sometimes it is necessary to query and modify global settings in the
43 * server. For this, PulseAudio has the introspection API. It can list sinks,
44 * sources, samples and other aspects of the server. It can also modify the
45 * attributes of the server that will affect operations on a global level,
46 * and not just the application's context.
48 * \section query_sec Querying
50 * All querying is done through callbacks. This design is necessary to
51 * maintain an asynchronous design. The client will request the information
52 * and some time later, the server will respond with the desired data.
54 * Some objects can have multiple entries at the server. When requesting all
55 * of these at once, the callback will be called multiple times, once for
56 * each object. When the list has been exhausted, the callback will be called
57 * without an information structure and the eol parameter set to a positive
60 * Note that even if a single object is requested, and not the entire list,
61 * the terminating call will still be made.
63 * If an error occurs, the callback will be called without an information
64 * structure and eol set to a negative value..
66 * Data members in the information structures are only valid during the
67 * duration of the callback. If they are required after the callback is
68 * finished, a deep copy must be performed.
70 * \subsection server_subsec Server Information
72 * The server can be queried about its name, the environment it's running on
73 * and the currently active global defaults. Calling
74 * pa_context_get_server_info() will get access to a pa_server_info structure
75 * containing all of these.
77 * \subsection memstat_subsec Memory Usage
79 * Statistics about memory usage can be fetched using pa_context_stat(),
80 * giving a pa_stat_info structure.
82 * \subsection sinksrc_subsec Sinks and Sources
84 * The server can have an arbitrary number of sinks and sources. Each sink
85 * and source have both an index and a name associated with it. As such
86 * there are three ways to get access to them:
88 * \li By index - pa_context_get_sink_info_by_index() /
89 * pa_context_get_source_info_by_index()
90 * \li By name - pa_context_get_sink_info_by_name() /
91 * pa_context_get_source_info_by_name()
92 * \li All - pa_context_get_sink_info_list() /
93 * pa_context_get_source_info_list()
95 * All three method use the same callback and will provide a pa_sink_info or
96 * pa_source_info structure.
98 * \subsection siso_subsec Sink Inputs and Source Outputs
100 * Sink inputs and source outputs are the representations of the client ends
101 * of streams inside the server. I.e. they connect a client stream to one of
102 * the global sinks or sources.
104 * Sink inputs and source outputs only have an index to identify them. As
105 * such, there are only two ways to get information about them:
107 * \li By index - pa_context_get_sink_input_info() /
108 * pa_context_get_source_output_info()
109 * \li All - pa_context_get_sink_input_info_list() /
110 * pa_context_get_source_output_info_list()
112 * The structure returned is the pa_sink_input_info or pa_source_output_info
115 * \subsection samples_subsec Samples
117 * The list of cached samples can be retrieved from the server. Three methods
118 * exist for querying the sample cache list:
120 * \li By index - pa_context_get_sample_info_by_index()
121 * \li By name - pa_context_get_sample_info_by_name()
122 * \li All - pa_context_get_sample_info_list()
124 * Note that this only retrieves information about the sample, not the sample
127 * \subsection module_subsec Driver Modules
129 * PulseAudio driver modules are identified by index and are retrieved using either
130 * pa_context_get_module_info() or pa_context_get_module_info_list(). The
131 * information structure is called pa_module_info.
133 * \subsection client_subsec Clients
135 * PulseAudio clients are also identified by index and are retrieved using
136 * either pa_context_get_client_info() or pa_context_get_client_info_list().
137 * The information structure is called pa_client_info.
139 * \section ctrl_sec Control
141 * Some parts of the server are only possible to read, but most can also be
142 * modified in different ways. Note that these changes will affect all
143 * connected clients and not just the one issuing the request.
145 * \subsection sinksrc_subsec Sinks and Sources
147 * The most common change one would want to do to sinks and sources is to
148 * modify the volume of the audio. Identical to how sinks and sources can
149 * be queried, there are two ways of identifying them:
151 * \li By index - pa_context_set_sink_volume_by_index() /
152 * pa_context_set_source_volume_by_index()
153 * \li By name - pa_context_set_sink_volume_by_name() /
154 * pa_context_set_source_volume_by_name()
156 * It is also possible to mute a sink or source:
158 * \li By index - pa_context_set_sink_mute_by_index() /
159 * pa_context_set_source_mute_by_index()
160 * \li By name - pa_context_set_sink_mute_by_name() /
161 * pa_context_set_source_mute_by_name()
163 * \subsection siso_subsec Sink Inputs and Source Outputs
165 * If an application desires to modify the volume of just a single stream
166 * (commonly one of its own streams), this can be done by setting the volume
167 * of its associated sink input or source output, using
168 * pa_context_set_sink_input_volume() or pa_context_set_source_output_volume()
170 * It is also possible to remove sink inputs and source outputs, terminating
171 * the streams associated with them:
173 * \li Sink input - pa_context_kill_sink_input()
174 * \li Source output - pa_context_kill_source_output()
176 * \subsection module_subsec Modules
178 * Server modules can be remotely loaded and unloaded using
179 * pa_context_load_module() and pa_context_unload_module().
181 * \subsection client_subsec Clients
183 * The only operation supported on clients, is the possibility of kicking
184 * them off the server using pa_context_kill_client().
189 * Routines for daemon introspection.
191 * See also \subpage introspect
196 /** @{ \name Sinks */
198 /** Stores information about a specific port of a sink. Please
199 * note that this structure can be extended as part of evolutionary
200 * API updates at any time in any new release. \since 0.9.16 */
201 typedef struct pa_sink_port_info {
202 const char *name; /**< Name of this port */
203 const char *description; /**< Description of this port */
204 uint32_t priority; /**< The higher this value is the more useful this port is as a default */
205 int available; /**< A flags (see #pa_port_available),indicating availability status of this port. \since 2.0 */
208 /** Stores information about sinks. Please note that this structure
209 * can be extended as part of evolutionary API updates at any time in
210 * any new release. */
211 typedef struct pa_sink_info {
212 const char *name; /**< Name of the sink */
213 uint32_t index; /**< Index of the sink */
214 const char *description; /**< Description of this sink */
215 pa_sample_spec sample_spec; /**< Sample spec of this sink */
216 pa_channel_map channel_map; /**< Channel map */
217 uint32_t owner_module; /**< Index of the owning module of this sink, or PA_INVALID_INDEX */
218 pa_cvolume volume; /**< Volume of the sink */
219 int mute; /**< Mute switch of the sink */
220 uint32_t monitor_source; /**< Index of the monitor source connected to this sink */
221 const char *monitor_source_name; /**< The name of the monitor source */
222 pa_usec_t latency; /**< Length of queued audio in the output buffer. */
223 const char *driver; /**< Driver name. */
224 pa_sink_flags_t flags; /**< Flags */
225 pa_proplist *proplist; /**< Property list \since 0.9.11 */
226 pa_usec_t configured_latency; /**< The latency this device has been configured to. \since 0.9.11 */
227 pa_volume_t base_volume; /**< Some kind of "base" volume that refers to unamplified/unattenuated volume in the context of the output device. \since 0.9.15 */
228 pa_sink_state_t state; /**< State \since 0.9.15 */
229 uint32_t n_volume_steps; /**< Number of volume steps for sinks which do not support arbitrary volumes. \since 0.9.15 */
230 uint32_t card; /**< Card index, or PA_INVALID_INDEX. \since 0.9.15 */
231 uint32_t n_ports; /**< Number of entries in port array \since 0.9.16 */
232 pa_sink_port_info** ports; /**< Array of available ports, or NULL. Array is terminated by an entry set to NULL. The number of entries is stored in n_ports \since 0.9.16 */
233 pa_sink_port_info* active_port; /**< Pointer to active port in the array, or NULL \since 0.9.16 */
234 uint8_t n_formats; /**< Number of formats supported by the sink. \since 1.0 */
235 pa_format_info **formats; /**< Array of formats supported by the sink. \since 1.0 */
238 /** Callback prototype for pa_context_get_sink_info_by_name() and friends */
239 typedef void (*pa_sink_info_cb_t)(pa_context *c, const pa_sink_info *i, int eol, void *userdata);
241 /** Get information about a sink by its name */
242 pa_operation* pa_context_get_sink_info_by_name(pa_context *c, const char *name, pa_sink_info_cb_t cb, void *userdata);
244 /** Get information about a sink by its index */
245 pa_operation* pa_context_get_sink_info_by_index(pa_context *c, uint32_t idx, pa_sink_info_cb_t cb, void *userdata);
247 /** Get the complete sink list */
248 pa_operation* pa_context_get_sink_info_list(pa_context *c, pa_sink_info_cb_t cb, void *userdata);
250 /** Set the volume of a sink device specified by its index */
251 pa_operation* pa_context_set_sink_volume_by_index(pa_context *c, uint32_t idx, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);
253 /** Set the volume of a sink device specified by its name */
254 pa_operation* pa_context_set_sink_volume_by_name(pa_context *c, const char *name, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);
256 /** Set the mute switch of a sink device specified by its index */
257 pa_operation* pa_context_set_sink_mute_by_index(pa_context *c, uint32_t idx, int mute, pa_context_success_cb_t cb, void *userdata);
259 /** Set the mute switch of a sink device specified by its name */
260 pa_operation* pa_context_set_sink_mute_by_name(pa_context *c, const char *name, int mute, pa_context_success_cb_t cb, void *userdata);
262 /** Suspend/Resume a sink. \since 0.9.7 */
263 pa_operation* pa_context_suspend_sink_by_name(pa_context *c, const char *sink_name, int suspend, pa_context_success_cb_t cb, void* userdata);
265 /** Suspend/Resume a sink. If idx is PA_INVALID_INDEX all sinks will be suspended. \since 0.9.7 */
266 pa_operation* pa_context_suspend_sink_by_index(pa_context *c, uint32_t idx, int suspend, pa_context_success_cb_t cb, void* userdata);
268 /** Change the profile of a sink. \since 0.9.16 */
269 pa_operation* pa_context_set_sink_port_by_index(pa_context *c, uint32_t idx, const char*port, pa_context_success_cb_t cb, void *userdata);
271 /** Change the profile of a sink. \since 0.9.15 */
272 pa_operation* pa_context_set_sink_port_by_name(pa_context *c, const char*name, const char*port, pa_context_success_cb_t cb, void *userdata);
276 /** @{ \name Sources */
278 /** Stores information about a specific port of a source. Please
279 * note that this structure can be extended as part of evolutionary
280 * API updates at any time in any new release. \since 0.9.16 */
281 typedef struct pa_source_port_info {
282 const char *name; /**< Name of this port */
283 const char *description; /**< Description of this port */
284 uint32_t priority; /**< The higher this value is the more useful this port is as a default */
285 int available; /**< A flags (see #pa_port_available) indicating availability status of this port. \since 2.0 */
286 } pa_source_port_info;
288 /** Stores information about sources. Please note that this structure
289 * can be extended as part of evolutionary API updates at any time in
290 * any new release. */
291 typedef struct pa_source_info {
292 const char *name; /**< Name of the source */
293 uint32_t index; /**< Index of the source */
294 const char *description; /**< Description of this source */
295 pa_sample_spec sample_spec; /**< Sample spec of this source */
296 pa_channel_map channel_map; /**< Channel map */
297 uint32_t owner_module; /**< Owning module index, or PA_INVALID_INDEX */
298 pa_cvolume volume; /**< Volume of the source */
299 int mute; /**< Mute switch of the sink */
300 uint32_t monitor_of_sink; /**< If this is a monitor source the index of the owning sink, otherwise PA_INVALID_INDEX */
301 const char *monitor_of_sink_name; /**< Name of the owning sink, or PA_INVALID_INDEX */
302 pa_usec_t latency; /**< Length of filled record buffer of this source. */
303 const char *driver; /**< Driver name */
304 pa_source_flags_t flags; /**< Flags */
305 pa_proplist *proplist; /**< Property list \since 0.9.11 */
306 pa_usec_t configured_latency; /**< The latency this device has been configured to. \since 0.9.11 */
307 pa_volume_t base_volume; /**< Some kind of "base" volume that refers to unamplified/unattenuated volume in the context of the input device. \since 0.9.15 */
308 pa_source_state_t state; /**< State \since 0.9.15 */
309 uint32_t n_volume_steps; /**< Number of volume steps for sources which do not support arbitrary volumes. \since 0.9.15 */
310 uint32_t card; /**< Card index, or PA_INVALID_INDEX. \since 0.9.15 */
311 uint32_t n_ports; /**< Number of entries in port array \since 0.9.16 */
312 pa_source_port_info** ports; /**< Array of available ports, or NULL. Array is terminated by an entry set to NULL. The number of entries is stored in n_ports \since 0.9.16 */
313 pa_source_port_info* active_port; /**< Pointer to active port in the array, or NULL \since 0.9.16 */
314 uint8_t n_formats; /**< Number of formats supported by the source. \since 1.0 */
315 pa_format_info **formats; /**< Array of formats supported by the source. \since 1.0 */
318 /** Callback prototype for pa_context_get_source_info_by_name() and friends */
319 typedef void (*pa_source_info_cb_t)(pa_context *c, const pa_source_info *i, int eol, void *userdata);
321 /** Get information about a source by its name */
322 pa_operation* pa_context_get_source_info_by_name(pa_context *c, const char *name, pa_source_info_cb_t cb, void *userdata);
324 /** Get information about a source by its index */
325 pa_operation* pa_context_get_source_info_by_index(pa_context *c, uint32_t idx, pa_source_info_cb_t cb, void *userdata);
327 /** Get the complete source list */
328 pa_operation* pa_context_get_source_info_list(pa_context *c, pa_source_info_cb_t cb, void *userdata);
330 /** Set the volume of a source device specified by its index */
331 pa_operation* pa_context_set_source_volume_by_index(pa_context *c, uint32_t idx, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);
333 /** Set the volume of a source device specified by its name */
334 pa_operation* pa_context_set_source_volume_by_name(pa_context *c, const char *name, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);
336 /** Set the mute switch of a source device specified by its index */
337 pa_operation* pa_context_set_source_mute_by_index(pa_context *c, uint32_t idx, int mute, pa_context_success_cb_t cb, void *userdata);
339 /** Set the mute switch of a source device specified by its name */
340 pa_operation* pa_context_set_source_mute_by_name(pa_context *c, const char *name, int mute, pa_context_success_cb_t cb, void *userdata);
342 /** Suspend/Resume a source. \since 0.9.7 */
343 pa_operation* pa_context_suspend_source_by_name(pa_context *c, const char *source_name, int suspend, pa_context_success_cb_t cb, void* userdata);
345 /** Suspend/Resume a source. If idx is PA_INVALID_INDEX all sources will be suspended. \since 0.9.7 */
346 pa_operation* pa_context_suspend_source_by_index(pa_context *c, uint32_t idx, int suspend, pa_context_success_cb_t cb, void* userdata);
348 /** Change the profile of a source. \since 0.9.16 */
349 pa_operation* pa_context_set_source_port_by_index(pa_context *c, uint32_t idx, const char*port, pa_context_success_cb_t cb, void *userdata);
351 /** Change the profile of a source. \since 0.9.15 */
352 pa_operation* pa_context_set_source_port_by_name(pa_context *c, const char*name, const char*port, pa_context_success_cb_t cb, void *userdata);
356 /** @{ \name Server */
358 /** Server information. Please note that this structure can be
359 * extended as part of evolutionary API updates at any time in any new
361 typedef struct pa_server_info {
362 const char *user_name; /**< User name of the daemon process */
363 const char *host_name; /**< Host name the daemon is running on */
364 const char *server_version; /**< Version string of the daemon */
365 const char *server_name; /**< Server package name (usually "pulseaudio") */
366 pa_sample_spec sample_spec; /**< Default sample specification */
367 const char *default_sink_name; /**< Name of default sink. */
368 const char *default_source_name; /**< Name of default source. */
369 uint32_t cookie; /**< A random cookie for identifying this instance of PulseAudio. */
370 pa_channel_map channel_map; /**< Default channel map. \since 0.9.15 */
373 /** Callback prototype for pa_context_get_server_info() */
374 typedef void (*pa_server_info_cb_t) (pa_context *c, const pa_server_info*i, void *userdata);
376 /** Get some information about the server */
377 pa_operation* pa_context_get_server_info(pa_context *c, pa_server_info_cb_t cb, void *userdata);
381 /** @{ \name Modules */
383 /** Stores information about modules. Please note that this structure
384 * can be extended as part of evolutionary API updates at any time in
385 * any new release. */
386 typedef struct pa_module_info {
387 uint32_t index; /**< Index of the module */
388 const char*name, /**< Name of the module */
389 *argument; /**< Argument string of the module */
390 uint32_t n_used; /**< Usage counter or PA_INVALID_INDEX */
391 /** \cond fulldocs */
392 int auto_unload; /**< \deprecated Non-zero if this is an autoloaded module */
394 pa_proplist *proplist; /**< Property list \since 0.9.15 */
397 /** Callback prototype for pa_context_get_module_info() and friends*/
398 typedef void (*pa_module_info_cb_t) (pa_context *c, const pa_module_info*i, int eol, void *userdata);
400 /** Get some information about a module by its index */
401 pa_operation* pa_context_get_module_info(pa_context *c, uint32_t idx, pa_module_info_cb_t cb, void *userdata);
403 /** Get the complete list of currently loaded modules */
404 pa_operation* pa_context_get_module_info_list(pa_context *c, pa_module_info_cb_t cb, void *userdata);
406 /** Callback prototype for pa_context_load_module() */
407 typedef void (*pa_context_index_cb_t)(pa_context *c, uint32_t idx, void *userdata);
409 /** Load a module. */
410 pa_operation* pa_context_load_module(pa_context *c, const char*name, const char *argument, pa_context_index_cb_t cb, void *userdata);
412 /** Unload a module. */
413 pa_operation* pa_context_unload_module(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void *userdata);
417 /** @{ \name Clients */
419 /** Stores information about clients. Please note that this structure
420 * can be extended as part of evolutionary API updates at any time in
421 * any new release. */
422 typedef struct pa_client_info {
423 uint32_t index; /**< Index of this client */
424 const char *name; /**< Name of this client */
425 uint32_t owner_module; /**< Index of the owning module, or PA_INVALID_INDEX */
426 const char *driver; /**< Driver name */
427 pa_proplist *proplist; /**< Property list \since 0.9.11 */
430 /** Callback prototype for pa_context_get_client_info() and friends*/
431 typedef void (*pa_client_info_cb_t) (pa_context *c, const pa_client_info*i, int eol, void *userdata);
433 /** Get information about a client by its index */
434 pa_operation* pa_context_get_client_info(pa_context *c, uint32_t idx, pa_client_info_cb_t cb, void *userdata);
436 /** Get the complete client list */
437 pa_operation* pa_context_get_client_info_list(pa_context *c, pa_client_info_cb_t cb, void *userdata);
439 /** Kill a client. */
440 pa_operation* pa_context_kill_client(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void *userdata);
444 /** @{ \name Cards */
446 /** Stores information about a specific profile of a card. Please
447 * note that this structure can be extended as part of evolutionary
448 * API updates at any time in any new release. \since 0.9.15 */
449 typedef struct pa_card_profile_info {
450 const char *name; /**< Name of this profile */
451 const char *description; /**< Description of this profile */
452 uint32_t n_sinks; /**< Number of sinks this profile would create */
453 uint32_t n_sources; /**< Number of sources this profile would create */
454 uint32_t priority; /**< The higher this value is the more useful this profile is as a default */
455 } pa_card_profile_info;
457 /** Stores information about cards. Please note that this structure
458 * can be extended as part of evolutionary API updates at any time in
459 * any new release. \since 0.9.15 */
460 typedef struct pa_card_info {
461 uint32_t index; /**< Index of this card */
462 const char *name; /**< Name of this card */
463 uint32_t owner_module; /**< Index of the owning module, or PA_INVALID_INDEX */
464 const char *driver; /**< Driver name */
465 uint32_t n_profiles; /**< Number of entries in profile array */
466 pa_card_profile_info* profiles; /**< Array of available profile, or NULL. Array is terminated by an entry with name set to NULL. Number of entries is stored in n_profiles */
467 pa_card_profile_info* active_profile; /**< Pointer to active profile in the array, or NULL */
468 pa_proplist *proplist; /**< Property list */
471 /** Callback prototype for pa_context_get_card_info_...() \since 0.9.15 */
472 typedef void (*pa_card_info_cb_t) (pa_context *c, const pa_card_info*i, int eol, void *userdata);
474 /** Get information about a card by its index \since 0.9.15 */
475 pa_operation* pa_context_get_card_info_by_index(pa_context *c, uint32_t idx, pa_card_info_cb_t cb, void *userdata);
477 /** Get information about a card by its name \since 0.9.15 */
478 pa_operation* pa_context_get_card_info_by_name(pa_context *c, const char *name, pa_card_info_cb_t cb, void *userdata);
480 /** Get the complete card list \since 0.9.15 */
481 pa_operation* pa_context_get_card_info_list(pa_context *c, pa_card_info_cb_t cb, void *userdata);
483 /** Change the profile of a card. \since 0.9.15 */
484 pa_operation* pa_context_set_card_profile_by_index(pa_context *c, uint32_t idx, const char*profile, pa_context_success_cb_t cb, void *userdata);
486 /** Change the profile of a card. \since 0.9.15 */
487 pa_operation* pa_context_set_card_profile_by_name(pa_context *c, const char*name, const char*profile, pa_context_success_cb_t cb, void *userdata);
491 /** @{ \name Sink Inputs */
493 /** Stores information about sink inputs. Please note that this structure
494 * can be extended as part of evolutionary API updates at any time in
495 * any new release. */
496 typedef struct pa_sink_input_info {
497 uint32_t index; /**< Index of the sink input */
498 const char *name; /**< Name of the sink input */
499 uint32_t owner_module; /**< Index of the module this sink input belongs to, or PA_INVALID_INDEX when it does not belong to any module */
500 uint32_t client; /**< Index of the client this sink input belongs to, or PA_INVALID_INDEX when it does not belong to any client */
501 uint32_t sink; /**< Index of the connected sink */
502 pa_sample_spec sample_spec; /**< The sample specification of the sink input */
503 pa_channel_map channel_map; /**< Channel map */
504 pa_cvolume volume; /**< The volume of this sink input */
505 pa_usec_t buffer_usec; /**< Latency due to buffering in sink input, see pa_latency_info for details */
506 pa_usec_t sink_usec; /**< Latency of the sink device, see pa_latency_info for details */
507 const char *resample_method; /**< The resampling method used by this sink input. */
508 const char *driver; /**< Driver name */
509 int mute; /**< Stream muted \since 0.9.7 */
510 pa_proplist *proplist; /**< Property list \since 0.9.11 */
511 int corked; /**< Stream corked \since 1.0 */
512 int has_volume; /**< Stream has volume. If not set, then the meaning of this struct's volume member is unspecified. \since 1.0 */
513 int volume_writable; /**< The volume can be set. If not set, the volume can still change even though clients can't control the volume. \since 1.0 */
514 pa_format_info *format; /**< Stream format information. \since 1.0 */
515 } pa_sink_input_info;
517 /** Callback prototype for pa_context_get_sink_input_info() and friends*/
518 typedef void (*pa_sink_input_info_cb_t) (pa_context *c, const pa_sink_input_info *i, int eol, void *userdata);
520 /** Get some information about a sink input by its index */
521 pa_operation* pa_context_get_sink_input_info(pa_context *c, uint32_t idx, pa_sink_input_info_cb_t cb, void *userdata);
523 /** Get the complete sink input list */
524 pa_operation* pa_context_get_sink_input_info_list(pa_context *c, pa_sink_input_info_cb_t cb, void *userdata);
526 /** Move the specified sink input to a different sink. \since 0.9.5 */
527 pa_operation* pa_context_move_sink_input_by_name(pa_context *c, uint32_t idx, const char *sink_name, pa_context_success_cb_t cb, void* userdata);
529 /** Move the specified sink input to a different sink. \since 0.9.5 */
530 pa_operation* pa_context_move_sink_input_by_index(pa_context *c, uint32_t idx, uint32_t sink_idx, pa_context_success_cb_t cb, void* userdata);
532 /** Set the volume of a sink input stream */
533 pa_operation* pa_context_set_sink_input_volume(pa_context *c, uint32_t idx, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);
535 /** Set the mute switch of a sink input stream \since 0.9.7 */
536 pa_operation* pa_context_set_sink_input_mute(pa_context *c, uint32_t idx, int mute, pa_context_success_cb_t cb, void *userdata);
538 /** Kill a sink input. */
539 pa_operation* pa_context_kill_sink_input(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void *userdata);
543 /** @{ \name Source Outputs */
545 /** Stores information about source outputs. Please note that this structure
546 * can be extended as part of evolutionary API updates at any time in
547 * any new release. */
548 typedef struct pa_source_output_info {
549 uint32_t index; /**< Index of the source output */
550 const char *name; /**< Name of the source output */
551 uint32_t owner_module; /**< Index of the module this source output belongs to, or PA_INVALID_INDEX when it does not belong to any module */
552 uint32_t client; /**< Index of the client this source output belongs to, or PA_INVALID_INDEX when it does not belong to any client */
553 uint32_t source; /**< Index of the connected source */
554 pa_sample_spec sample_spec; /**< The sample specification of the source output */
555 pa_channel_map channel_map; /**< Channel map */
556 pa_usec_t buffer_usec; /**< Latency due to buffering in the source output, see pa_latency_info for details. */
557 pa_usec_t source_usec; /**< Latency of the source device, see pa_latency_info for details. */
558 const char *resample_method; /**< The resampling method used by this source output. */
559 const char *driver; /**< Driver name */
560 pa_proplist *proplist; /**< Property list \since 0.9.11 */
561 int corked; /**< Stream corked \since 1.0 */
562 pa_cvolume volume; /**< The volume of this source output \since 1.0 */
563 int mute; /**< Stream muted \since 1.0 */
564 int has_volume; /**< Stream has volume. If not set, then the meaning of this struct's volume member is unspecified. \since 1.0 */
565 int volume_writable; /**< The volume can be set. If not set, the volume can still change even though clients can't control the volume. \since 1.0 */
566 pa_format_info *format; /**< Stream format information. \since 1.0 */
567 } pa_source_output_info;
569 /** Callback prototype for pa_context_get_source_output_info() and friends*/
570 typedef void (*pa_source_output_info_cb_t) (pa_context *c, const pa_source_output_info *i, int eol, void *userdata);
572 /** Get information about a source output by its index */
573 pa_operation* pa_context_get_source_output_info(pa_context *c, uint32_t idx, pa_source_output_info_cb_t cb, void *userdata);
575 /** Get the complete list of source outputs */
576 pa_operation* pa_context_get_source_output_info_list(pa_context *c, pa_source_output_info_cb_t cb, void *userdata);
578 /** Move the specified source output to a different source. \since 0.9.5 */
579 pa_operation* pa_context_move_source_output_by_name(pa_context *c, uint32_t idx, const char *source_name, pa_context_success_cb_t cb, void* userdata);
581 /** Move the specified source output to a different source. \since 0.9.5 */
582 pa_operation* pa_context_move_source_output_by_index(pa_context *c, uint32_t idx, uint32_t source_idx, pa_context_success_cb_t cb, void* userdata);
584 /** Set the volume of a source output stream \since 1.0 */
585 pa_operation* pa_context_set_source_output_volume(pa_context *c, uint32_t idx, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);
587 /** Set the mute switch of a source output stream \since 1.0 */
588 pa_operation* pa_context_set_source_output_mute(pa_context *c, uint32_t idx, int mute, pa_context_success_cb_t cb, void *userdata);
590 /** Kill a source output. */
591 pa_operation* pa_context_kill_source_output(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void *userdata);
595 /** @{ \name Statistics */
597 /** Memory block statistics. Please note that this structure
598 * can be extended as part of evolutionary API updates at any time in
599 * any new release. */
600 typedef struct pa_stat_info {
601 uint32_t memblock_total; /**< Currently allocated memory blocks */
602 uint32_t memblock_total_size; /**< Current total size of allocated memory blocks */
603 uint32_t memblock_allocated; /**< Allocated memory blocks during the whole lifetime of the daemon */
604 uint32_t memblock_allocated_size; /**< Total size of all memory blocks allocated during the whole lifetime of the daemon */
605 uint32_t scache_size; /**< Total size of all sample cache entries. */
608 /** Callback prototype for pa_context_stat() */
609 typedef void (*pa_stat_info_cb_t) (pa_context *c, const pa_stat_info *i, void *userdata);
611 /** Get daemon memory block statistics */
612 pa_operation* pa_context_stat(pa_context *c, pa_stat_info_cb_t cb, void *userdata);
616 /** @{ \name Cached Samples */
618 /** Stores information about sample cache entries. Please note that this structure
619 * can be extended as part of evolutionary API updates at any time in
620 * any new release. */
621 typedef struct pa_sample_info {
622 uint32_t index; /**< Index of this entry */
623 const char *name; /**< Name of this entry */
624 pa_cvolume volume; /**< Default volume of this entry */
625 pa_sample_spec sample_spec; /**< Sample specification of the sample */
626 pa_channel_map channel_map; /**< The channel map */
627 pa_usec_t duration; /**< Duration of this entry */
628 uint32_t bytes; /**< Length of this sample in bytes. */
629 int lazy; /**< Non-zero when this is a lazy cache entry. */
630 const char *filename; /**< In case this is a lazy cache entry, the filename for the sound file to be loaded on demand. */
631 pa_proplist *proplist; /**< Property list for this sample. \since 0.9.11 */
634 /** Callback prototype for pa_context_get_sample_info_by_name() and friends */
635 typedef void (*pa_sample_info_cb_t)(pa_context *c, const pa_sample_info *i, int eol, void *userdata);
637 /** Get information about a sample by its name */
638 pa_operation* pa_context_get_sample_info_by_name(pa_context *c, const char *name, pa_sample_info_cb_t cb, void *userdata);
640 /** Get information about a sample by its index */
641 pa_operation* pa_context_get_sample_info_by_index(pa_context *c, uint32_t idx, pa_sample_info_cb_t cb, void *userdata);
643 /** Get the complete list of samples stored in the daemon. */
644 pa_operation* pa_context_get_sample_info_list(pa_context *c, pa_sample_info_cb_t cb, void *userdata);
648 /** \cond fulldocs */
650 /** @{ \name Autoload Entries */
652 /** \deprecated Type of an autoload entry. */
653 typedef enum pa_autoload_type {
654 PA_AUTOLOAD_SINK = 0,
655 PA_AUTOLOAD_SOURCE = 1
656 } pa_autoload_type_t;
658 /** \deprecated Stores information about autoload entries. Please note that this structure
659 * can be extended as part of evolutionary API updates at any time in
660 * any new release. */
661 typedef struct pa_autoload_info {
662 uint32_t index; /**< Index of this autoload entry */
663 const char *name; /**< Name of the sink or source */
664 pa_autoload_type_t type; /**< Type of the autoload entry */
665 const char *module; /**< Module name to load */
666 const char *argument; /**< Argument string for module */
669 /** \deprecated Callback prototype for pa_context_get_autoload_info_by_name() and friends */
670 typedef void (*pa_autoload_info_cb_t)(pa_context *c, const pa_autoload_info *i, int eol, void *userdata);
672 /** \deprecated Get info about a specific autoload entry. */
673 pa_operation* pa_context_get_autoload_info_by_name(pa_context *c, const char *name, pa_autoload_type_t type, pa_autoload_info_cb_t cb, void *userdata) PA_GCC_DEPRECATED;
675 /** \deprecated Get info about a specific autoload entry. */
676 pa_operation* pa_context_get_autoload_info_by_index(pa_context *c, uint32_t idx, pa_autoload_info_cb_t cb, void *userdata) PA_GCC_DEPRECATED;
678 /** \deprecated Get the complete list of autoload entries. */
679 pa_operation* pa_context_get_autoload_info_list(pa_context *c, pa_autoload_info_cb_t cb, void *userdata) PA_GCC_DEPRECATED;
681 /** \deprecated Add a new autoload entry. */
682 pa_operation* pa_context_add_autoload(pa_context *c, const char *name, pa_autoload_type_t type, const char *module, const char*argument, pa_context_index_cb_t, void* userdata) PA_GCC_DEPRECATED;
684 /** \deprecated Remove an autoload entry. */
685 pa_operation* pa_context_remove_autoload_by_name(pa_context *c, const char *name, pa_autoload_type_t type, pa_context_success_cb_t cb, void* userdata) PA_GCC_DEPRECATED;
687 /** \deprecated Remove an autoload entry. */
688 pa_operation* pa_context_remove_autoload_by_index(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void* userdata) PA_GCC_DEPRECATED;